Commander preconstructed decks, Secret Lair releases, and others are under the same restrictions as Booster Pack products
It can end someones night on the spot with the right payoffs
As for the Fabled set's champ card, fans will be excited to see Maleficent return in all her glory
There's not quite enough coherence between different bestow cards to make a fully-functional 'Bestow' deck, but Kestia comes close to tying everything together, while already being a perfectly fine payoff for running a bunch of auras
Modern Horizons 3 is reinvigorating energy counters, introducing some powerful new cards that make use of this resource in intriguing and diverging ways
I recently got back into playing Magic after about 15 years, and Im happy that my current more-mathematically minded brain is finding many ways of analysing the game (so expect more posts on this in the near future)